Horton Guyford Stever earned a Ph.D. in physics at Caltech in 1941 and became a member of the staff at the Radiation Lab of MIT until 1942, when he went to London as a scientific liaison officer through the end of World War II. He then returned to MIT as a member of the faculty, rising to become associate dean of engineering from 1956-1959. He remained a professor of aeronautical engineering until 1965 and then served as president of Carnegie-Mellon University until 1972. Meanwhile, he had begun an extensive and distinguished additional career of service to government. For example, he was chief scientist of the Air Force from 1955-1956 and served on its scientific advisory board from 1947-1969 (as chairman, 1962-1969). He was director of the National Science Foundation, 1972-1976, and in 1973 he became scientific and technical advisor to President Gerald R. Ford, Jr., a post he held until 1977. Along the way, he served on advisory committees to the NACA, including its special committee on space technology, and to NASA, including a stint as chairman of an independent panel of experts established by the National Research Council to advise NASA and monitor its compliance with the recommendations of the Rogers Commission that investigated the Challenger explosion in 1986.